GeForce GT 745M and Radeon HD 8990 OEM - video card comparison
GeForce GT 745M
Radeon HD 8990 OEM
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
N14P-LP/GS
Malta
Market segment
Laptop
Desktop
Release date
April 2013
April 2013
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
-
2x 8-pin
Boost clock speed
-
1000 MHz
Core clock speed
837 MHz
950 MHz
Floating-point performance
642.8 gflops
2x 4,096 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
4,313 million
Pipelines / CUDA cores
384
2048
Power consumption (TDP)
45 Watt
375 Watt
Texture fill rate
17.57
128.0
Memory type
DDR3, GDDR5
GDDR5
Maximum RAM amount
2 GB
3 GB
Memory bus width
128 Bit
384 Bit
Memory clock speed
1800 MHz
6000 MHz
Memory bandwidth
64 GB/s
288.0 GB/s
Shared memory
-
-
Standard memory configuration
DDR3/GDDR5
-
Display Connectors
No outputs
1x DVI, 4x mini-DisplayPort
eDP 1.2 signal support
Up to 3840x2160
-
LVDS signal support
Up to 1920x1200
-
VGA аnalog display support
Up to 2048x1536
-
DisplayPort Multimode (DP++) support
Up to 3840x2160
-
HDCP content protection
+
-
HDMI
+
-
7.1 channel HD audio on HDMI
+
-
DirectX
12 API
12 (11_1)
CUDA
+
-
OpenCL
1.1
1.2
OpenGL
4.5
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2.131
3D Vision / 3DTV Play
+
-
Blu-Ray 3D Support
+
-
H.264, VC1, MPEG2 1080p video decoder
+
-
Optimus
+
-
TrueHD and DTS-HD audio bitstreaming
+
-